'Cross-platform' in the sense that it has to accommodate mobile and desktop which is certainly one of the hardest bits of cross-platform. I know true cross-platform is infinitely harder because the differences go all the way through the OS and down to CPU architecture.

I too would like to see where WASM can go. I think that combined with cross-platform "cores" like Agilebit's use of Rust could be a very viable solution longterm.